'Duskmourn' cards

No Way Out enters with three dread counters. You can never leave - If a player would planeswalk while this plane has dread counters, chaos ensues instead. Whenever you roll the planar die, manifest dread. (Look at the top two cards of your library. Put one onto the battlefield face down as a 2/2 creature and the other into your graveyard. Turn it face up any time for its mana cost if it's a creature card.) Whenever Chaos ensures each player may turn a face-down permanent they control face-up. Remove a dread counter from this plane.

At the beginning of your second main phase, if you control a tapped creature, manifest dread. (Look at the top two cards of your library. Put one onto the battlefield face down as a 2/2 creature and the other into your graveyard. Turn it face up any time for its mana cost if it's a creature card.) Whenever Chaos ensues, exile target creature. If it's an instant or sorcery, cast it without paying its mana cost. Otherwise put it onto the battlefield under its owner's control.